Acylation of Anisole Catalyzed by Hierarchical Porous Hβ Zeolite Modified with Cr

doi:10.1007/s40242-018-8151-9

Abstract

Abstract: Modified hierarchical porous Hβ zeolite was obtained by metal modification of Hβ zeolite, which was treated with alkaline solution, and the catalysts before and after modification were characterized by means of X-ray diffraction(XRD), nitrogen adsorption-desorption, scanning electron microscopy(SEM), X-ray fluorescence(XRF), NH₃ temperature-programmed desorption and Fourier-transform infrared spectroscopy(FTIR). The activities of acylation of anisole with acetic anhydride were also investigated. The results show that the Hβ zeolite, which was treated with alkaline solution has microporous and mesoporous structures that could improve the diffusion performance of chemical reaction. The amount of acid was modulated with metal modification. The Hβ zeolite modified by 5%(mass fraction) metal chromium had the best catalytic performance. The conversion of acetic anhydride acylation was 93.01% under the optimal conditions, which was higher than that of other catalysts. The catalyst not only showed good activity, but also exhibited a stable performance in regeneration tests.

Key words: Hierarchical porous Hβ zeolite, Anisole, Acetic anhydride, Acylation

LI Guohua, LI Huipeng, ZHAO Hua, CAI Tianfeng, LI Yange and GUAN Shengnan. Acylation of Anisole Catalyzed by Hierarchical Porous Hβ Zeolite Modified with Cr[J]. Chemical Research in Chinese Universities, 2018, 34(6): 877-881.

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